English Amiga Board - View Single Post - Differences between the original A2000 and later B2000

mark_k · 19 December 2012, 22:16

If you google for "A500/A2000 Technical Reference Manual" (with the quotes) the first result is a PDF of that document. [I didn't put the URL here in case the site owner doesn't want people linking directly to it.]

Pages 228-229 of the PDF are one of the A2000 PAL equations, with comment "THE CLOCK IS NOW TILED THROUGHOUT THE SPACE $D80000-DBFFFF. IF MORE PRECISE SELECTION TO $D80000-$D8FFFF IS REALLY NEEDED, THEN THIS MUST BE DONE EXTERNALLY USING THE /CS INPUT ON THE CLOCK CHIP."

The part of the A2000 schematic which includes the MSM6242B is on page 266. I don't think it does anything funky with the /CS0 or C1 pins.

19 December 2012, 22:16	#5
mark_k Registered User Join Date: Aug 2004 Location: Posts: 3,346	If you google for "A500/A2000 Technical Reference Manual" (with the quotes) the first result is a PDF of that document. [I didn't put the URL here in case the site owner doesn't want people linking directly to it.] Pages 228-229 of the PDF are one of the A2000 PAL equations, with comment "THE CLOCK IS NOW TILED THROUGHOUT THE SPACE $D80000-DBFFFF. IF MORE PRECISE SELECTION TO $D80000-$D8FFFF IS REALLY NEEDED, THEN THIS MUST BE DONE EXTERNALLY USING THE /CS INPUT ON THE CLOCK CHIP." The part of the A2000 schematic which includes the MSM6242B is on page 266. I don't think it does anything funky with the /CS0 or C1 pins.